Drilling machine



Patented Feb. 8,y 1927. l

DRTLLING MACHINE.

. application filed `January e, 1923. .serial No. e11,171.

My invention relates -to fluid pressure motors and drilling machines and particularly though not exclusively to hammer rock drills. Y

My invention willbe best iurderstood from the accompanying drawing 'and 'following description. of one specific embodiment ot my invention selected for illustrative purposes, while the :scope of my invention will be more particularly pointed out in the appended claims. i

In the 'drawing:

Fig. 1 shows alongitudinalsection of a hammer rock drill with parts omitted;

, Figs. 2 and?) respectively ,are sections on .the lines 2*?l .and 3 3 of l;

Fig. 4c isfa section corresponding to Fig. 3 with .the parts moved to a .diiferent position; Y

Fig. 5 is :a section on 'the line 5-5 of Figzpl with the ,eccentrics rotatedninety de- 'A grecs out of position;

i Fig. 4.

Fig. ,6 is a section corresponding to Fig. 5 with parts moved to a differ-ent position;

Fig. 7 is a sectiononthe line 7 7 of Fig.

8 is a vsection on .the line r8 8 of Referring` 4to the drawings have Vshown a working tool exemplified hya drill steel the shank portion Sfof whichis received in the sectional chuck 5 yin such mannerthat it is constrained .to rotate with the chuck. llteerwardly of .the chuck I provide. a hammer 7 which as herein illustrated' takes the form of a reciprocating' pistonA provided with the hammerbar 9 adapted to strike .therearward end of the shank ctt .the drillfsteel.,

d series ot" external gear teeth 15 and'17.V Surrounding the'series of gear teeth 15 is ayoke men'iber 19 provided with an annular .series oi" internal gear teeth 21 which mesh with thegear teeth 15. VSui-reundin'g `the seriesof gear teeth 17 is a yoke member 23 lprovided with series ofV internal `gear teeth :'25 which mesh with Ythevgear .teeth 17..

At opposite sidesof the chu trated .by Fig. 1,1 provide rota-tively.mountv` v.ed shafts .27. each of which carries the-spaced eccentrics 29 Land 31,.'the former Vbeing formedintegrally withthe .shafts and `the* Vlatterrbeingk removably keyed thereto forfr convenience `in ..assemblingthe parts. .'The..

yokes 19 "and 23- atopposite sides thereof are provided with bores' in which the eccentrics .are received. l f

For causing the shafts 27to rotate in unison Veach :shaft vherein has keyed thereto a gear 35 each-ofwhich meshes with an idle gear 37 which may be'mounted -for rotation in vany convenient manner and hereinrisl shown vmounted upon thev chuck.; The parts .Y are so constructed and arranged that the two eccentrics 29 andthe two eccentrics 31 re spectively rota-te. in phase whilst the'eccenf tricity .of the .eccentrica .The action ofthe gear teeth 21 or 25 upon the gear teeth l5 or 17 respectively serves to ytransmit this rotary. motion to the chuck, but `at. .considerably reduced speed, which. is to'. sayy a reduction gear is formed by the arrangement described. It willbe Falso noticed that if torce .isvapplied to one of the nfl-embers 19 andv23 to cause Vit to partake .of its gyratoryor orbital movement .the .shafts 27 l will bef rotated and consequently .theother member will'be .given a similar-motion. I make nse of lthe above yprinciples to `form an exceedingly compact and effective motor and reduction gear for `;y

'rotating the chuck.- e n e l Referring to Fig-1 ofthe drawingit willv be noticed that herein I provide .the casing 11 with sections recessed to receive the gears and yokeg fand affording fdiaphragmsBS one of' which separatesthe yoke 19 from the" gears 35' and'37 and the other offwhich-separates the two Ayokes. The -yokes slidingly bear against the bottoms Y*of .the recesses re-f asv Yio

`ceiving themandagainst the diaphragms in a uid tightr manner. The portions of these recesses surrounding the yokes provide the chambers/t illustrated in Figs. 3 to 6. As sl'iovvneach Vof* the chambers a() Idivide into -twofchambers VWhich `are alternately exypanded and AContracted as the members 19y and -23 move varound. their orbit. To this end I herein mount in the casingthe oscillatory cylindrical plugs 39 which yare provided with the diametrica-l slots 41'which slidingly receive the members 43, the latter Vbearing against the same surfaces as the sides of Vthe yoke and having cylindrical heads 45 mounted kfor oscillation in the memlbers 19 and 23. 'These parts areso con-r structed.: as to yfit their bearing'surfaces in a fluid tight manner and'serve as ypartitions `preventing luidfrom passing from one expansible chamber tothe other. For a'pur? .pose hereinafter described these partitions are'shown arranged atthe ends of the longitudinal axis of the member QSaiidat the ends-ofthe' transverse axis of the member 19.

Herein for admittingmotive Vfluid to the I expansible chambers above described I provide the lcasing with 'passages tleading from the source of motive fluid supply'for V thevma'chine and with which communicate I f f members 19 `and 23 asis clearly 'illustrated by Figs. 3 and 8.A Ina 'similar manner ex- K tov fas members 19 and 23. i Y

iacesV of themenibersA 19 and Q3 through passages A19-formed inthe diaphragme 38 and terminating in ports 51 opening upon one ofthe transversefaces of each lof the haust passages leading to the atmosphere open through passages 54C terminating in ports 5.5 to the same transverse faces' of the said members arepassages 57 vadaptedto at times register with the ports 51 andpassages V59 adapted tol at times register with the The ports 51 ando? and the ports 55V and 59 VVVare sodisposed thatmotiveriiuid will be alternately admitted and exhausted to` and i from opposite sides of the `partitions 13. Re"

ferringtoFig. 3 itwill be noticed thatv with the parts in the `Vposition illustrated by Ythat figure *motivefluid is admitted to the right hand expansible chamber, the ports 51 and "being in register, while"y the left hand 'expan'sible chamberl will be in communication with the atmosphere, ther ports V and feo 59 'belonging' to this chamber being in reg?v ister. After the eccentricshave turned 180 degrees, as is shown by Fig. 4,`motivefluid will` be admitted to the left .hand expansible chamber and theeright .hand exgansible chamber will be connected to the atmosphere,

Vfor Vaswill be noticed by Fig. 4L, the ports 57 and 5'13of the left hand chamber are infregfy istei" and theports 59 'and 55of the right 'i handchamber arein register; i

Leading from these.

Referring to Figs. 5 and G'iit will be noticed that with the parts in the position shown by Fig. 5 the motive Huid will be admitted to'the lower side of the member-'23 while the upper side will be connectedto the atmosphere. Vilhcn the eccenti'ics'have turned 18() degrees to bring the parts into tlie position shown by Fig. 6 motive fluid'will `be admitted to the upper side ofthe mem-V ber and will be exhausted from beneath' it@ i lt will be understood from the above de'- scribed operation that the admission and exhaust for operating the member 19 occurs ninety degrees in advance of that' of the member In other words. considering` the members 19 and 23 as motor pistons the same are set in quartering relation. a tendency to prevent dead-centering.

25 are 180 degrees apart. This tends to neutralize vibration because said. members move at all times in tach other. Y

Although I have described. an example of' the. invention having both the members 19 and 23 geared to thel chuck it will be .understood that onlyV one of these' members may be geared to the chuck, in which case motive fluid may operate upon only onel of the members 0r upon both of them. Further it will be understood that if but one ofthe members 19 andv23jis geared to the chuck andV n'iotive tluid is admitted to act oiilynpon the other member the latter will serve as a motor piston and the other merely as a reduction gear member. 'It will be likewise understood that if the forward member 23 only is geared tothe chuck the rearward member 19 need notvsurroundY thefchuck.V Y

.`he precise arrangement adopted willV depend upon theV conditions of operation, namely, principally upon the size Vof the parts and the speed desired.V It willV be further understood that'although .l have described for ,purposes of 'illustration one speciiie embodiment of` my invention wide vdeviations maybe made therefrom without This has y Itl Vwill also be noticed that the members 19 and opposite Ydirections tov loro lie

iatY

teeth,y a casing for said vmember formingkr therewitlran expansible chamber intersected by planes including the pitch circles of'said' seriesof gearteeth. and means for admitting' motive fluid to said casing and exhausting'it therefrom for causing said member to operate. v

fil)

' coaxial With said chuck and drill steel, a-

terna-l gear. for fgyratiii-g it.

`l Leica-se Y .2. 'in ialid'iilliiig macihiineya ham-mer piston loi' @pera 'g a '.'diiill steel, :a rotaiy :chuck termed lior 'carrying said' di'il'ilffsteel, said chuck calin-Tying fan external'geair, an annular internal gear sii-rroundiiiig said 'chi porting said internal gearv for gyratory iiioweirient, and lmeans permitting inotivc fluid to iact upon ith'e periphery 'oft Ysaid .rex-- Vlii `a 'drilling machiiie,:a liaimii'ier piston tor operati'nga drill steel, a chuck termed or carrying said drill steel, said chuck carrying an external rigea-i', an annular 'internal gear :surrounding :said chuck andmesh;

ing -W-it-h 'said external gear, means at the side 'otf said chuck Y supporting said internal lfor Vl'atorgy movement, and means iormfing with 4'said internal gear an expansible chamber iii-otor in which the motive fluid lacts directly `upon lsaid internal gear nes lincluding the pitch circles oit said gears. Y

l. Vln a rock drill, ya chuck, va pair of eccentifics at opposite sides ot said chuck, a

member mounted on said eccentrics and sui-,

rounding said chuc'k, external 'gear teeth carri-edl by'said lchuck iii'eshing with internal'.

gear teeth on said member, and means 4permitting motive vilulid to act directly 'upon said member for gyra'ting it. p l v n a rock drill, a chuck, -a pair oleocentrics Lat opposite sid-es ot said chuck, amenibei mounted on said eccentricsA and surrounding said chuck, external Vgear teeth carried by said 4.chuck meshing'v with" internal gear teeth ron said member, means ycausing said eccen-trics to rotate in unison, and -ineans permitting'motive'fluid to act-directly upon said member foigyi'atiiig it 6. In a Irock drill, a chuckormed forearryiii'g'adrill steel, a hammer piston'coaxial with said `chuck and drill steel, ailuid pressure 'motor tor 'rotating said chuck, said motor havin-g an y'annular piston member surbeil surroi'iniliiig the axis oi" said pistonanddrill steel, meansv at the side fot ?sai'd axis for ii'iouiiting said piston tor gyiatory move'- iiient around said axis-and speed reducing f means vconnecting said motor 'to said chuck.`

8. In a rock drill, a chuck formed for carrying a vdrill steel, a Vhammer` piston 'iliiid pressure motor tor rotating said-chuck,

said motor havinganannular piston inem# bei' surrounding the axis -o'l'f said piston and land speed `reducing me :and -nifo'tor "to l said chuck.

meshing wit-lr said external geur, means supcarrying al bers surrounding said chuck,v shaftsva't opp'osite sides ot said chuck, eccentrics on said other drill steel, "means :including r:an eccentric at t-lf yside oit said :axislior mounting fsai'd piston torlgyratory iiiovement around saiid laxis, f

9. :ln :a rock drill, a chuck formed for carrying a `:drill steel., a hai'iimer piston, a fluid pressurevii'io'tor for rotating"saidchuck, said motore having ia. member surrounding ,.t'liea-x-is olf-said piston and drill steel and mounted tor Vorbital movement about said" axis, said-iiiotor havingV shafts at opposite sides oit' saidl axis, air-eccentric 'cai'.iiedby each sh'aift,.said eccentrics supporting said meinberot said motor,aY gear carriedby Yeach shaft, a gear connecting saidgears,

means for permitting motive fluid to" actdif rectly upon ysaid member for causing said member to operate, and speed y:reducing meansv Vtor ycausing said motor torotate said lO. In va .rock drill, a lchuck formed tor carrying :a drill steel, a pair of members surrounding said chuck each having internal gear teeth .meshing with external gear teeth on said chuck, a vmounting vlfor'sai'd .ii'ieiigibeifs permitting them to gyrate around said ychuck Vin out of phase relation, fand means tor permitting motive lui'dvto act clirectly on said members v:tor -gyrating' them. li. In a rock drill, a chuck formed `for carrying aV drill steel, `a 'pair ot members ysursouiiding said chuck eac-h having .intern'a-l .wear teeth meshing with external gear teeth -on said chuck, a mounting -torgsaid ans connecting `said members permitting them tol gyrate around said' chuck iii quartering relation, andineans motive fluid to :act directly tor :permit on said members lor gyrating them.`

Q12. In a rock drill, a chuck, formedA forv carrying a drill steel, aplurality of mein-V heis surrounding said chuckand in'ounted` 'for .conjoint orbital movement, one ot' said ln'ieiifibers having gear Ateeth meshing With gearft-eeth on said fichu'ck, iandnieaiis for perii'ii'tting 'motive 'fluid Ato act upon fan'other 'of said vuienibers tory causing sfaidconjoint movement. '1 4 y leln a-rock drill, a chuck termed `for crill steel, a plurality otmemshafts on which said members are mounted,

` Aone ot said members having gear teeth mesh-v ing With gear teeth on said chuck, and means for permitting ii'iotive'ilujid to act on an-y said' members' tor rotating said` shafts.

lll. Inarocltdrill, a chuck toi-ined for carrying ii drill steel, `a hammer piston for operating said drill steel, a plurality' ot iueii'iliers rounding the axis otfsaiddrill, Vsteel and pistonand lmounted torl coniomtv orbital involvement about said axis, one, of

said iiiembershaving gear teethV meshing vvwitlrgear -teeth on said chuck, and mea-ns L other of said members for causing said confor pern'iitting motive fluid to act on anjoint movement.

i In a 'rock drill, aAeehuck formed forv cari-ying, a drill steel, ar hammer piston for oi'ierating said'di'ill steel, a Vplurality of ,g memberssurrounding the axis of said drill steel and piston, shafts at opposite sides io 1ot1saidaxis,` ecceiitrics on said shafts on \`\"liieh1said members ai'e mounted,A one of `said members having gear teethf meshing withV gear ,teeth` on said chuck, and means Yfor permitting motive `fluid to act on an,-Y

other of lsaid members :for rotating said Y shafts'.

- external series,.said member being mounted Y 16. In a drilling machine, achuck carryvingan external series of gear teeth, a member-surrounding said Vchuck carrying an in teinal series of gear teeth inY mesh with said to permit said internal sei-ies of gear teeth to gyrate around said external series of gear teeth, a casing for 'said'y member forming therewithan expansible chamber intersected byplanes including the pitch circles of said series o'lf'gear teeth, and means directly con-V trolled lby-"said member for admitting motive'fluid to said casi-ng and exhausting it therefiom't'or causing said member tooperate. Y i u v1.7. In a drilling machine, al hammer v piston for operating a drill steel, a rotary chuck formed for carifyingl said drill steel, said chuck carrying` an external gear, an annular internal gear surroundingsaid chuck Vand vmeshing with said Vexternal gear, means 'supporting-said internal gear for gyratory iiiovement, and means permitting motive fluidrto act upon the periphery of said external gear for gyrating it, said motive fluid Y "being directly controlled by said external ear. i

Ina drilling machine, archiick, a membei'. directly geared by geai vteeth to said f chuck, means for permitting motive fluid to actdirectly upon said member in planes'including theipitch circles of the gear teeth for Vcausing `said member to operate to rotate said'chuck, and said motive Huid being di- Y rectly controlled by said'member.

.19. In'arock drill, a chuck, a pair of ecycenti'ics'at opposite sides of said chuck, a member mounted on said eccentrics and surrounding saidv chuck,external gear teeth Ycarried by said chuck meshing with internal gear teeth VVon said member, means permit-l f ting motive fluid to act directly upon said member for gyratmg it, and said motive fluid being directly controlled by said membei'.V` f Y s f Y f *20. `In a Vrock drilla chuck, a Vpair ot eccentrics` at opposite sides of said chuck, a

' member mounted on said eccentrics and .surrounding said chuck, external gear teeth 'carried by said chuck meshing Withinternal gear teeth on said member, means causing I said eccentiics tov rotate in unison, means permitting motive fluid to actpdirectly upon said member for gyratingV it, and saidfmotive Huid being directly controlledby said mem-` ber. Y

21.,In a iock drill, a chuck formed for carrying a drilll steel, a hammer piston, a

fluid pressure motor for rotating said chuck,

said motorl having a member surrounding the axisl of ,said piston and drill steel and mounted for orbital movement about said, axis, said motor having shafts atopposite sides ot said axis, an eccentric carried by" each'l shaft, eccentrics supporting said member of said motor, a gear carried by each shaft, a gear connecting said gears,V means`V for permitting motive fiuid-v to act directly upon said memberfor causing said member to operate, said motivefluid being ydirectly controlled by said member, and speed reduc-.

ing means for causing said motor to rotate: said'chuck.

22. In a rock drill, a chuck formed for carrying a drill steel, a pair ofmembers surrounding said chuck each `having internal gear teeth meshingwith external Agear teeth on said chuck, a mounting for saidmembersy permitting them to gyrate aroundsaid chuck iii out ofphase relation, means for permitting motive fluid to act directly on said mem- .bers for gyrating them, and/.such motive fluid being directly controlled by -said members. Y

423. In a rock drill, a chuck formed Jfor rectly on said members forlgyrating them, Y and said motive fluid for each member being directly and' separately controlled thereby 24. In a rock drill, a chuck formed for Vcarrying a drill steel, a plurality'of members surrounding said chuck andmounted tor conjoint orbital movement, one of said memu bers `having gear teeth meshing with gear.

teeth 'on said chuck, means .for permitting motive fluid to actupon another of said Y members :for causing said conjointmove-` ment, and said motive fluid'beingv directly controlled by ,said member i'iponivhich"itV acts. i

V2 5. VIn a' rock drill, a chuck formed tor carrying a drill steel, a plurality of. mem- `bers surroundingfsaid chuck, shattsvat opposite sides oic said chuck, eccentrics on said ing withV gear teeth on said.. chuck, means for permitting motive fluid toact on another shafts on Which said members are mount-ed, one of said members having gear teeth meshi ico ,ofesaid vmember-sgator,rotating said shafts,=and said motiveuid being .directly controlled bythe member upon which fit acts. 526. fIn :a rock -drill, 'sa fehuckfformed itor carrying a drillsteel, apluralityaotlmembeiis surrounding said chuck'fand mounted `for cenjointorbitale nioveinent,.one 4of `said inembers having gear .teethmiesh-ingxwithgear Ateeth on said chuck, means for permitting moltiueuid to :actjiupnn another of' said members for Vcausing said conjoint move ment, and said motive fluid beingdirectly controlled by one of said members. v

27. In a rock drill, a cliuckformed for carrying ai drill steel,v a plurality of members surrounding said chuck, shafts at opposite sides of said chuck, eccentrics on said shafts on Which said members are mounted one of said members having gear teeth meshing With gear teeth on said chuck, means for permitting motive fluid to act on another of' said members for rotating said shafts, and

said motive fluid being directly controlled by one of said members.

'28. In a rock drill, a chuck formed for carrying a drill steel, a hammer piston for operating` said drill steel, a plurality of members surrounding the axis of said drill steel and piston and mounted for conjoint orbital movement about said axis, one oi"` said members having gear teeth meshing With gear teeth on said chuck, means for permitting motive fluid to act on another of said members for causing said conjointl movement, and said motive fluid being directly controlled by the member upon Which it acts.

29. In a rock drill, a chuck formed for carrying a drill steel, a hammer pistonv for operating said drill steel, a plurality of members surrounding the axis of said drill steel and piston and mounted for conjoint orbital movement about said axis, one of said members having gear teethmeshing With gear teeth on said chuck, means for permitting motive fluid to act on another of said members for causing said conjointV movement, and said motive fluid being diiectly controlled by one of said members.

30. In a rock drill, al chuck formed for carrying` a drill steel, a hammer piston for operating said drill steel, a plurality of members surrounding the axis of said drill steel and piston, shafts at opposite sidesof said axis, eccentrics on said shafts on Which said members are mounted, one of said members having gear teeth meshing With gear teeth on said chuck, means for permitting motive fluid to act on another of said members for rotating said shafts, and said vmotive'fluid being directly controlled by the member upon Which it acts.

31. In arock drill, a chuck formed for carrying a drill steel, a hammer piston for operating said drill' steel, a plurality of bers having ,gear teeth meshing ywith .gear

teeth .on sai'drhuck, .means forfgpermitting motive fluid to acte-.0n another of ssaid .mempbers :forv rotating fsaid shafts,..and said-moof' i sai d'jmembers.

Y 82. In a". hammer rodk drill, a chuckformed v,tive flfuidgbeing .directly controlled one` `for carrying a .drill steel, a` hammer piston for operating said steel, said chuck having external gear teeth, a member surrounding` said chuck and having internal gear teeth meshing With said external `gear teeth, a mounting for said member permitting it to gyrate about said chuck, and means permit" ting motive luid to act `upon said member in planes including said mounting and the pitch circles of said gear teeth for causing said member togyrate.

33. In a hammer rock drill, a chuck formed for carrying a drill steel, a hammer piston for operating said steel, said'chuck having external gear teeth, a member surrounding said chuck and having internal gear teeth meshing with said external gear" teeth, a mounting for said member permitting it to gyrate yabout said chuck, and means permitting motive fluid to act upon said member in planes vincludimg said mounting and the pitch circles of said gear teeth for causing said member'to gyrate, said motive fluid being directly controlled bysaid member.

34. In a'fluid pressuremotor, a pair of eccent-rics mounted for rotation, a member mounted upon said eccentrics, Y a casing, means cooperating with said member and casing to provideV an expansible chamber, and means for admitting and exhausting motive fluid to and from said chamber.

35. In a rock drill, a chuck formed for carrying a drill steel, a piston for operating said drill steel, a casing for said chuck and piston, said casing having therein a motor member mounted for gyratorymovement,

lmeshing gear teeth carried by said member` and chuck for converting said Q"yratory movement into rotary movement for `said chuck, and means for permitting motive i'iuid to act upon said motor member in planes including said mountingl and the .pitch 'circles of said' gear teeth for causing isc ' 'Y Y L1,616,486

m'otiv'euidto Vfici: upon seid motor member pi'r of Vpauzrl'lel annular gyratory members j V exteriorlythereof A'for causing its gyratory substantially coaxiali With sadchuck and movement.;V piston and connected in driving relation f 37; In a 'dri'llingrmachnm a Chuck formed with said chuck, and means for causing mo- 'orcarrying a drill steel, a hammer piston tive fluid to act upon one of said gyratory' 15V for opera-tingsaid steel, a casing for said members for gyrating it. f Y chuck/and piston, a motor and redllCtiOIl In testimony whereof, I have signed my gearingzforjrotatng said chuck, said movname to this Especification. tor and `reduction gearing being Vozu'- 1 i Y 10 ried [by Vsaid casing and comprising a i I GEORGE H. GILMAN. 

